When evaluating a hole pattern with datums A and B, what is required for each hole axis?

• A. Each hole axis must be within the true position tolerance relative to datums A and B.
• B. Each hole axis must be perpendicular to both datums A and B.
• C. Each hole axis must pass through the datum origin.
• D. Each hole axis must be parallel to the datum plane.

Answer: (A)

The main idea is that true position controls where each hole axis must sit in relation to the datum reference frame defined by A and B. When a hole pattern is evaluated with two datums, every hole axis must lie inside the cylindrical tolerance zone defined by the true position relative to those datums. The datums establish the reference orientation and location, so the requirement is about location accuracy of the hole centers, not about being perpendicular to the datums, passing through a specific origin, or being parallel to a plane unless those features are explicitly called out. In short, each hole axis must be within the true position tolerance relative to datums A and B.